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2020 Fiscal Year Final Research Report

Identification of salivary citrullination-related substances using salivaomic analysis

Research Project

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Project/Area Number 19K24107
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0907:Oral science and related fields
Research InstitutionKanagawa Dental College

Principal Investigator

Sakaguchi Wakako  神奈川歯科大学, 大学院歯学研究科, 助教 (50420972)

Project Period (FY) 2019-08-30 – 2021-03-31
Keywords関節リウマチ / α-1 antitripsin(A1AT) / 抗CCP抗体 / ACPA / 唾液検査 / DBAマウス
Outline of Final Research Achievements

In this study, salivary proteins of RA model mice were comprehensively analyzed by proteomics, and the pathogenesis of RA was elucidated from a pathological point of view. H-E staining of the ankle joint of RA model mice showed joint destruction and infiltration of inflammatory cells in the surrounding area. Western blotting detected bands corresponding to 46 kDa (A1AT) and 55 kDa (CCP) in serum, saliva, and ankle, and proteomics analysis of these bands identified citrullinated A1AT in saliva and serum. Immunostaining of the ankle joint with A1AT and anti-CCP antibody shows a strong positive signal on the synovium, and A1AT is involved in protein citrullination and may be involved in the onset and severity of RA.

Free Research Field

環境病理学

Academic Significance and Societal Importance of the Research Achievements

関節リウマチ (RA) は病因・病態は未だ解明されておらず、発症の予防や根本的な治療法はまだない。早期に薬物療法を開始することで RAを寛解させ関節破壊を抑制し、機能障害を起こさないようにするには、早期に診断、治療をすることが重要となる。唾液検査は非侵襲的、簡便でスクリーニング検査としても用いやすく、癌や自己免疫疾患など様々な分野で注目されている検査方法で、RAにおいても疾患特異性の高い自己抗体は疾患診断のためのバイオマーカーとなりうる。これらの背景から、唾液を用いて網羅的に解析することでRA発症メカニズム、発症に関与する物質の解明し、唾液による新たな診断基盤を形成していく。

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Published: 2022-01-27  

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